The 3D Highway is a new kind of construction set. The "3D" in the 3D Highway doesn't mean you need special glasses for this set. It just means that kids can build up and down, giving the set a three-dimensional quality. The set comes with 72 construction pieces, 60 connectors, four die-cast cars, and decorative stickers and accessories. To attach the pieces, kids insert a modular connector into one piece and snap another piece to the other side of the connector. Kids can build highways and racetracks both horizontally and vertically. The illustrated instructions give kids ideas for how to build. There are more than 1,000,000 track combinations for kids to create using the pieces in this set. The included extractor tool makes it easy to disassemble the pieces.